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This is good advice on achieving the most secure SSH configuration: https://stribika.github.io/2015/01/04/secure-secure-shell.html https://stribika.github.io/20
by malingo 10y ago
This is good advice on achieving the most secure SSH configuration:
https://stribika.github.io/2015/01/04/secure-secure-shell.html https://stribika.github.io/2015/01/04/secure-secure-shell.ht...
"My goal with this post here is to make NSA analysts sad."
- codelitt 10y agoHahaha great quote. I haven't seen this article before. It looks quite good. Thanks for posting it.
- newman314 10y agoActually, I've improved on this somewhat by splitting configs to 6.5+ vs. older. Corrections welcome. At some point, I will get around to publishing it. Configs OpenSSH 6.5+ Server UsePrivilegeSeparation sandbox KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group14-sha1 Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes128-ctr MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512,hmac-sha2-256 OpenSSH Server Legacy #UsePrivilegeSeparation yes KexAlgorithms diffie-hellman-group14-sha1 Ciphers aes256-ctr,aes128-ctr MACs hmac-sha2-512,hmac-sha2-256 OpenSSH 6.5+ Client UseRoaming no IdentitiesOnly yes KexAlgorithms curve25519-sha256@libssh.org,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1 HostKeyAlgorithms ssh-ed25519-cert-v01@openssh.com,ssh-ed25519,ssh-rsa-cert-v01@openssh.com,ssh-rsa Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes128-ctr MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,hmac-sha1 Host * IdentityFile ~/.ssh/id_ed25519 IdentityFile ~/.ssh/id_rsa HashKnownHosts yes VisualHostKey yes VerifyHostKeyDNS ask AddressFamily inet ForwardX11 no ForwardX11Trusted no OpenSSH Client Legacy UseRoaming no IdentitiesOnly yes KexAlgorithms diffie-hellman-group14-sha1 HostKeyAlgorithms ssh-rsa-cert-v01@openssh.com,ssh-rsa Ciphers aes256-ctr,aes128-ctr MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha1-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,hmac-sha1 Host * IdentityFile ~/.ssh/id_rsa HashKnownHosts yes VisualHostKey yes VerifyHostKeyDNS ask AddressFamily inet ForwardX11 no ForwardX11Trusted no